Having a Spinal Tap (Lumbar Puncture)

During the test

You will lie on your side with your knees drawn into your chest. (This is called the fetal position.) Or you may be asked to sit bent forward, with your chin down. First, your low back will be wiped with a special disinfectant. Then your skin will be numbed with a medicine (local anesthetic). The provider will insert a sterile spinal needle through the skin of your lower back until it reaches the sac that contains the cerebrospinal fluid (CSF). You may feel some pain or pressure when this happens. It is important to stay still during the test. Some spinal fluid will be taken out through the needle. The needle is then removed. Finally, a small bandage is placed over the skin puncture site. You may be asked to lie still for a short time before you leave.

After the test

• When you’re able to leave, have an adult family member or friend drive you home. 

• When you get home, rest lying down for a certain period of time as directed by your provider.

• If you get a headache, lying flat and drinking plenty of fluids may help relieve it. Often the headache is more painful when you stand. It gets better over time. You may also want to take an over-the-counter pain reliever as advised. But don't take aspirin. Caffeine drinks may help relieve a headache after a spinal tap. These include soda, coffee, or tea. A headache may also occur with an upset stomach (nausea), vomiting, or dizziness.

• The day after your spinal tap, you can remove your bandage.

• Your provider will tell you when your test results are ready.

Call your healthcare provider if you have:

• A severe headache or a headache that lasts 2 or more days

• Double vision

• Pain in your back that doesn't go away

• Tingling in your groin or legs

• Fever

• Change in bowel or urination functions

• New symptoms or symptoms get worse